Tractor seat



FIG. 1 is a perspective view of a tractor seat embodying my new design;

FIG. 2 is a right side elevation view of the tractor seat; the left side view being a mirror image of the same;

FIG. 3 is a front elevation view of the same;

FIG. 4 is a rear elevation view of the same;

FIG. 5 is a top view of the same; and

FIG. 6 is a bottom view of the same. 

The ornamental design for a tractor seat, as shown. 